Examples for

Integers

The set of integers consists of the counting numbers, their negations and zero. They are central to many areas of mathematics, such as number theory and combinatorics. Wolfram|Alpha has extensive knowledge relating to integers and provides faculties for doing computations with them.
Integers

Learn about the characteristics of specific integers: whether they are prime, whether they are triangular, etc.

Compute properties of an integer:

28
170141183460469231731687303715884105727
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Integer Arithmetic

Do arithmetic with integers. Use exact arithmetic on arbitrarily large integers.

Do exact arithmetic with integers:

141(2^141) + 1
2009!

Compute the last digit of a large integer:

last digit of 9^9^9

Compute the last nonzero digit:

last nonzero digit of 178,000!
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